Speaker
Description
Blazars are under-studied at low radio frequencies in the MHz regime. This is a consequence of the difficulties in reaching the sensitivity and resolution levels necessary for accurate cross-matching to that frequency band. With the release of both the LOFAR Two-metre Sky Survey Data Release 2 (LoTSS DR2) at 140 MHz and LOFAR LBA Sky Survey (LoLSS DR1) at 54 MHz, it is now possible to create complete blazar catalogues in the Northern sky, finding counterparts to blazars identified in Roma-BZCAT(5th Edition) and MOJAVE samples. Here, we present the first results of this study to understand the spectral properties, compactness and radio luminosity distributions of our blazar sample down to the LOFAR bands. Furthermore, we investigate whether the radio-flat spectra (i.e., spectral indices ~0.5) observed in blazars in the GHz regime extend to 144 MHz and 54 MHz, and analyze what deviations from this behavior imply about the physical properties of the underlying plasma population.
| What is your career stage? | Graduate researcher (pre PhD) |
|---|---|
| Which telescopes do you use / are you affiliated with? | LOFAR, VLA |
